Proceedings of the International scientific and practical conference ―Israel Ukraine Forum of Science and Innovation‖ (April 27-29, 2026) / Publisher website: www.naukainfo.com. – Tel Aviv, Israel, 2026. - 262 p.

96 SYSTEMS ANALYSIS, MODELING AND OPTIMIZATION UDC 669.017:544.6:66.094.3 S.V. Bobyr Dr. Sc., Weizmann Institute of Science, Rehovot, Israel I.M. Chuiko PhD, Nekrasov Iron and Steel Institute of NASU Dnipro, Ukraine O.E. Baranovska PhD, Nekrasov Iron and Steel Institute of NASU Dnipro, Ukraine DEVELOPMENT OF STATISTICAL CALCULATION METHODS FOR THE DIFFUSION AND DENSITY PARAMETERS OF HYDROGEN IN HIGH- ENTROPYALLOYS Abstract. Statements of the Problem: High entropy alloys (HEA’s) have been the subject of intense study in recent years, due to the practical interest in it using for transporting and storage of hydrogen. Modern approaches based on first-principles calculations can provide an accurate description of diffusion parameters in metal– hydrogen (Me–H) systems. However, there is currently no systematic study or established methodology for calculating hydrogen parameters in high-entropy alloys. The purpose of this study is to develop a method for calculating hydrogen parameters in high-entropy alloys. Methodology & Theoretical Orientation: In the developed statistical computational model (SCM) the coefficient of hydrogen diffusion in metals has been calculated from first principle of statistical physics [1]. The activation